Sony XR-C5120RA Service Manual ▷ View online
21
21
XR-C5120RA
6-10.
SCHEMATIC DIAGRAM – KEY Board –
• See page 15 for Waveform.
(Page 19)
22
22
• IC Block Diagrams
– MAIN Board –
– MAIN Board –
IC1
TB2118F-EL-S
IC51
SAA6588T-118
IC301
CXA2509AQ-T4
IC361
LB1638M
IC401
TDA7462D013TR
VDD
AMP
AMP
AMP
VDD2
1
2
3 4 5 6
7
8
9
10
24 23
22 21
20
19
18
17
16 15
11
12
14 13
XO
OSC
CE
DIN
CK
DOUT
SR
I/O-1
I/O-2
OUT-1
OUT-2
VDD2
IFC
VDD
FM IN
AM IN
D-GND
FM CP OUT
VT
AM CP OUT
VCC
REG
A-GND
XI
SERIAL
INTERFACE
I/O
PORT
OSCILLATOR
ON/OFF
BUFFER
REFERENCE
DIVIDER
PHASE
COMPARATOR
20BIT
IF COUNTER
PRESCALLER
12BIT
PROGRAMMABLE
COUNTER
+
–
REGULATOR
18BIT
18BIT
22BIT
40BIT SHIFT
REGISTER
REF
VCC
SEEK/RECP
SEEK/RECP
+
–
SIG
4BIT SWALLOW
COUNTER
OUTPUT
PORT
+
+
SCOUT
MRO
MPTH
TCON
OSCO
OSCI
VSSD
VDDD
DAVN
SDA
VREF
MPX
VSSA
VDDA
AFIN
MAD
PSWN
SCL
2
1
6
15
11
13
16
14
12
INTERFACE
REGISTER
SIGNAL QUALITY
DECODER
CLOCKED
COMPARATOR
POWER SUPPLY
& RESET
TEST
CONTROL
OSCILLATOR
& CLOCK
PAUSE
DETECTOR
MULTI
PATH
DETECTOR
57kHz
8th ORDER
BAND-PASS FILTER
RDS/RDBS
DECODER
RDS/RDBS
DEMODULATOR
IIC BUS SLAVE
TRANSCEIVER
17
18
CIN
19
LVIN
20
8
7
DATA
CLOCK
DATA
CLOCK
4
4
5
9
10
3
4
5
+
–
–
+
–
+
–
+
–
+ –
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
21
22
23
26
27
28
29
30
31
32
33
34
37
38
39
40
24
25
PBFB1
PBRIN1
PBREF1
PBFIN1
35
36
PBGND
VCT
PBFIN2
PBREF2
PBRIN2
PBFB2
PBEQ1
PBOUT1
VCC
TAPEIN1
AUXIN1
MSLPF
LINEOUT1
NC
NC
G2FB
G1FB
MSTC
DGND
MSOUT
NC
NC
INSW
TAPESW
MSMODE
DRSW
MSSW
NC
NC
LINEOUT2
DIREF
AUXIN2
TAPEIN2
PBEQ2
PBOUT2
GND
F2
120
µ
/70
µ
X1
X1
VCT
+
F1
120
µ
/70
µ
24dB
F3
LPF
VCC
DETECT
MS ON/
OFF
FWD/RVS
TAPE EQ
TAPE/AUX
NR BIAS
24dB
MS
MODE
T2
T1
1
2
3
4
5
6
7
8
9
10
GND
IN1
VCC
IN2
GND
N.C.
OUT2
VS
OUT1
N.C.
CONTROL LOGIC
SE3L
SE3R
MUTE
SDA
SCL
PAUSE
OUT FL
OUT FR
OUT RL
OUT RR
SUBOUT+
SUBOUT–
VDD
GND
CREF
SE1L
SE1R
MD+
MD–
CDL+
CDL–
CDR–
CDR+
PDR
PDGND
PDL
SE2L
SE2R
INPUT
GAIN &
AUTO
ZERO
ZERO
PAUSE
DETECT
INPUT MUL
TIPLEXER &
MIXING ST
AGE
REAR SIDE
SELECTOR
FRONT SIDE
SELECTOR
LOUDNESS
CONTROL
CIRCUIT
INPUT
GAIN
BEEP
LOUDNESS
CONTROL
CIRCUIT
SOFT
MUTE
VOLUME
CONTROL
CIRCUIT
COMPANDER
TREBLE/
BASS
CONTROL
CIRCUIT
SUBWOOFER
OUT
FADER
SUBWOOFER
LP
IIC
BUS
DIGITAL CONTROL CIRCUIT
POWER
SUPPLY
FRONT
FADER
FRONT
FADER
REAR
FADER
REAR
FADER
VOICE BANDPASS
HP
LP
SDA
SCL
1
2
3
4
5
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
23
IC671
BA3918-V3
IC701
BA8270F-E2
+
–
+
–
+
–
+
–
OVER VOLTAGE
PROTECT
REGULATOR
1
2 3 4
5
6
7
8
9
10
12
11
NC
MODE2
MODE1
STB
VDD
AMP
VCC
ANT
COM
AM
FM
GND
1
2
3
4
5
5
6
7
8
9
10
14
13
12
11
BUS ON
SWITCH
RESET
SWITCH
BATTERY
SWITCH
BUS ON
RST
BATT
CLK
VREF
DATA
GND
VCC
RST
BUS ON
BUS ON
CLK IN
BU IN
DATA IN
DATA OUT
24
6-11.
IC PIN FUNCTION DESCRIPTION
•
MAIN BOARD IC501 MB90574PFV-G-222-BND (SYSTEM CONTROLLER)
Pin No.
Pin Name
I/O
Description
1
SEEKOUT
O
Seek control signal output to the FM/AM tuner unit (TU1)
AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
FM mode: Used for SD speed up at SEEK, BTM, or AF
“L” is output at tuner off
AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM
FM mode: Used for SD speed up at SEEK, BTM, or AF
“L” is output at tuner off
2
AF-SEEK
O
PLL low-pass filter time constant selection signal output at AF SEEK
“H” is output when AF SEEK Not used (open)
“H” is output when AF SEEK Not used (open)
3
NCO
O
Not used (open)
4
ST-MONO
I/O
FM stereo broadcasting detection signal input from the FM/AM tuner unit (TU1), or forced
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode
monaural control signal output to the FM/AM tuner unit (TU1)
“L” is input in the FM stereo mode, or “L” is output in the forced monaural mode
5
TUNMUTE
O
Muting on/off control signal output of the FM and AM tuner signal “H”: muting on
6
FM-ON
O
FM system power supply on/off control signal output to the BA3918 (IC671)
“L”: AM power on, “H”: FM power on
“L”: AM power on, “H”: FM power on
7
TU-ON
O
Tuner system power supply on/off control signal output to the BA3918 (IC671)
“H”: tuner power on
“H”: tuner power on
8
VCC
—
Power supply terminal (+5V)
9
NCO
O
Not used (open)
10
BUS-ON
O
Bus on/off control signal output to the SONY bus interface (IC701) “L”: bus on
11
SYSRST
O
Reset signal output to the SONY bus interface (IC701) “L”: reset
12
DOORSW
I
Front panel open/close detection signal input “L” is input when the front panel is closed
13
LCD SO
O
Serial data output to the liquid crystal display driver (IC901)
14
LCD CKO
O
Serial data transfer clock signal output to the liquid crystal display driver (IC901)
15
BEEP
O
Beep sound drive signal output terminal
16
LCD CE
O
Chip enable signal output to the liquid crystal display driver (IC901) “H” active
17
UNISI
I
Serial data input from the SONY bus interface (IC701)
18
UNISO
O
Serial data output to the SONY bus interface (IC701)
19
UNICKO
O
Serial data transfer clock signal output to the SONY bus interface (IC701)
20
SD-IN
I
Station detector detect input from the FM/AM tuner unit (TU1)
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
Stop level for SEEK, BTM, etc. is determined SD is present at input of “H”
21 to 23
NCO
O
Not used (open)
24
SIRCS
I
Sircs remote control signal input terminal Not used (fixed at “H”)
25
PLLSI
I
PLL serial data input from the FM/AM PLL (IC1)
26
PLLSO
O
PLL serial data output to the FM/AM PLL (IC1)
27
PLLCKO
O
PLL serial data transfer clock signal output to the FM/AM PLL (IC1)
28
PLLCE
O
PLL chip enable signal output to the FM/AM PLL (IC1) “H” active
29
ILL-ON
O
30, 31
NCO
O
Not used (open)
32
NOISE ON
O
Discharge control signal output for the noise detection circuit “H”: discharge
33
VSS
—
Ground terminal
34
C
—
Connected to coupling capacitor for the power supply
35
AD-ON
O
A/D converter power control signal output terminal
When the KEYACK (pin uh) that controls reference voltage power for key A/D conversion input
is active, “L” is output from this terminal to enable the input
When the KEYACK (pin uh) that controls reference voltage power for key A/D conversion input
is active, “L” is output from this terminal to enable the input
36
RE-IN0
I
37
RE-IN1
I
Power on/off control signal output of the illumination LED and liquid crystal display driver
(IC901) “H”: power on Depends on initial setting of power select switch (S501)
Power select switch (S501) on: “H” output at the accessory on
Power select switch (S501) off: “H” output at the power on
(IC901) “H”: power on Depends on initial setting of power select switch (S501)
Power select switch (S501) on: “H” output at the accessory on
Power select switch (S501) off: “H” output at the power on
Dial pulse input of the rotary encoder (RE901)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
(for VOLUME/BASS/TREBLE/BALANCE/FADER control)
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